(a) The students are most likely suffering from myopia, also known as nearsightedness. Myopia is a refractive error where the light entering the eye focuses in front of the retina instead of directly on it, causing objects that are close to appear blurred.
Diagram:
Object (less than 1 m away)
|
|
| Ciliary muscle
|
|
____________|______________
| |
| * |
| Retina Crystaline lens
| |
| |
| ______________|
| |
| |
| Iris
| |
| |
| Pupil
|_________________|
(b) Their problem can be solved by using corrective lenses, such as glasses or contact lenses, that help to focus light directly on the retina, allowing them to see objects clearly, even those that are close up.
(c) The power of the corrective lenses needed to solve their problem would depend on the specific prescription of each student. An eye examination by an optometrist or ophthalmologist would be necessary to determine the exact power needed for the corrective lenses.
Two students complain that they cannot see objects that are closer than 1 m from their eyes.
(a) What problem do they have? Describe it using a neat diagram.
(b) How can their problem be solved?
(c) Determine the power of the device that can be used to solve their problem.
1 answer